Overbought & Oversold
Some indicators act as the market's thermometers: tools that measure, as a number, how one-sided recent price action has been. When the number crosses the upper threshold it's called overbought (up too much, too fast); past the lower threshold, oversold (sold too much, too fast).
Each indicator uses its own thresholds. RSI is overbought above 70 and oversold below 30. Stochastic uses 80 and 20. CCI uses +100 and -100. For example, when Bitcoin drops 5% in a day, RSI often slips below 30 while Stochastic slips below 20 — several indicators pointing to 'oversold' at the same time is common.
Why give this state a name at all? Because many traders carry the expectation that 'whatever is stretched too far snaps back.' Oversold, they hunt for the bounce; overbought, the pullback. It's the intuition of a rubber band returning when you let go.
But the market is often not a rubber band. In a strong downtrend, price keeps falling while the oversold reading never clears; in a strong uptrend, it can stay overbought for weeks and keep climbing. Overbought/oversold tells you only that things are stretched — not whether the stretch will snap back or stretch further.
One more caution. When several indicators flash oversold together, it feels like evidence piling up — but these indicators are mostly the same price data computed in slightly different ways, so they almost always move together. Three indicators lighting up at once doesn't make the evidence three times stronger.
What the data actually shows
Barobara publishes the complete historical record of where Bitcoin actually went after these overbought/oversold signals fired. Spoiler: both 'bounce after oversold' and 'drop after overbought' come out close to a coin flip, with a slight tilt under some conditions. Compare the indicators yourself: RSI oversold, Stochastic oversold, CCI oversold, and on the other side RSI overbought, Stochastic overbought. The full list of win rates and expected values is in the setup catalog.Common misconceptions
First misconception: 'oversold = cheap, this is the bottom.' Oversold measures how lopsided recent movement was — it is not a judgment that the price is cheap. Markets have genuinely halved again while already oversold. Second misconception: 'RSI, Stochastic, and CCI are all oversold, so that's a strong buy case.' These indicators summarize the same price data in different ways, so they move together by construction. Several lighting up at once usually means the calculations overlap — not that the signal got stronger.
FAQ
Q. Can I make money buying oversold and selling overbought?
It doesn't work that simply. When Barobara counted every historical case, outcomes after oversold were mostly close to 50/50. Under some conditions the expected value is negative once fees are subtracted. It's safer to read these as status flags, not a strategy.
Q. Who decided the 70/30 and 80/20 thresholds?
They're conventions proposed by the indicators' creators that simply stuck. They're rulers of convenience, not laws of the market — nudging the thresholds doesn't grant any forecasting ability. What matters isn't the threshold number but the record of what actually happened when it was crossed.